Ultrasonic Pest Repeller By Shenzhen Aosion Photoelectricity Co., Ltd.

These Ultrasonic Pest Repeller is effective in controlling mice, rats, roaches fleas, flies, crickets, silverfish, waterbugs, moths, ants and most other common pests. Laboratory research has shown ultrasonic sound waves attack the auditory and nervous systems of most common pests causing them pain and discomfort. 140 decibels of sound pressure.
Pests will give up their source of food, water and shelter and move on. These high-intensity sound waves are out of the range of hearing of humans and most household pets such as dogs, cats, fishes, birds, and farm animals.
Power supply: 105 to 120VAC, 60 cycles, 220 to 240VAC, 50 cycles
Dimensions: 75.25 (dia.) x 122 ,Weight: 340g
Power consumption: 2W
Frequency range: 20,000Hz to 45,000 Hz (continuously variable)
Output sound pressure: 140dB / per speaker
Coverage: the effective coverage can be 4000sq feets.